Question

In a unit circle, the radian measure of the central angle is equal to the length of the ______

Answer 1

Answer:

A. Intercepted arc.

Step-by-step explanation:

From Geometry we know that arc ($s$), dimensionless, is measured by the following equation:

$s = \theta \cdot r$ (1)

Where:

$\theta$ - Central angle, measured in radians.

$r$ - Radius, dimensionless.

If the circle has a radius of 1. Then, we notice that arc is directly proportional to the central angle. Hence, the right answer is A.